move device headers to core

CANNOT LAND until we update lots of call-sites

BUG=skia:

Change-Id: Ibb957dbbf5baf2a2920887e48c03709d1f6c51e1
Reviewed-on: https://skia-review.googlesource.com/6982
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
3 files changed